Which out of the following are expressions with numbers only?
(a) y + 3
(b) (7 × 20) – 8z
(c) 5 (21 – 7) + 7 × 2
(d) 5
(e) 3x
(f) 5 – 5n
(g) (7 × 20) – (5 × 10) – 45 + p

Solution:

We will use the concepts of algebra to determine which out of the given are expressions with numbers only.

(a) y + 3 has a variable y
(b) (7 × 20) – 8z has a variable z
(c) 5 (21 – 7) + 7 × 2 is an expression that is independent of variables and has only numerical constants. Thus, this is an expression with numbers only.
(d) 5 is an expression that is independent of variables and has only a numerical constant. Thus, this is an expression with numbers only.
(e) 3x has a variable x
(f) 5 – 5n has a variable n
(g) (7 × 20) – (5 × 10) – 45 + p has a variable p

NCERT Solutions for Class 6 Maths Chapter 11 Exercise 11.3 Question 2

Which out of the following are expressions with numbers only? (a) y + 3 (b) (7 × 20) – 8z (c) 5 (21 – 7) + 7 × 2 (d) 5 (e) 3x (f) 5 – 5n (g) (7 × 20) – (5 × 10) – 45 + p

Summary:

(c) 5 (21 – 7) + 7 × 2 and (d) 5 are the expressions with numbers only since they have only numerical constants and the other expressions given involve variables.

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